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- Columnea Longipedicellata, a New Species of Gesneriaceae from Colombia
- Glox 2Nd Qtr 1999
- John L. Clark James F. Smith
- Columnea Rangelii (Gesneriaceae), a New Species from the Serranía De Los Paraguas in the Colombian Andes
- John L. Clark Department of Biological Sciences, Box 870345 the University of Alabama Tuscaloosa, Alabama 35487, U.S.A
- COLUMNEA CAUDATA and COLUMNEA MEGAFOLIA, TWO NEW SPECIES of GESNERIACEAE Columnea Caudata Y Columnea Megafolia, Dos Especies Nuevas De Gesneriaceae
- The Companion Genera: Codonanthe, Nematanthus and Xcodonatanthus
- Columnea, Gesneriaceae) and a Revision of the Species of Section Angustiflorae, a New Section Inferred from ITS and Chloroplast DNA Data Author(S): Lacie J
- Vascular Plant Species List Excluding: Pteriodophyte (Ferns & Allies) & Orchidaceae (Orchids)
- Reassessment of the Columnea Latent Viroid (Clvd) Taxonomic Classification
- October 1954 the American Horticultural Society, Inc
- Columnea Longipedicellata, a New Species of Gesneriaceae from Colombia
- Madonna Lilies a Capsulate History of Lilium Candidum
- Glox 3Rd Qtr 03
- Gesneriads Third Quarter 2016
- Checklist of Cultivars
- The Encyclopedia of Gardening